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[vsnet-alert 447] AAVSO News Flash - No. 31
- Date: Mon, 17 Jun 1996 13:14:31 -0400 (EDT)
- To: aavso-newsflash@aavso.org
- From: AAVSO <aavso@aavso.org>
- Subject: [vsnet-alert 447] AAVSO News Flash - No. 31
- Sender: owner-vsnet-alert@kusastro.kyoto-u.ac.jp
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
Tel. 617-354-0484 Fax 617-354-0665
INTERNET: aavso@aavso.org
* * * AAVSO NEWS FLASH * * *
Subject: IP Peg, FO Aql, AT Ara, No. 31
CH Cyg, RS Tel, AB Dra June 17, 1996
________________________________________________________________________________
IP PEGASI
The dwarf nova type cataclysmic variable IP Peg is in outburst as indicated
by the following observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
JUN 2.293 15.5 CCDV ZRE JUN 15.289 14.2 CCDV ZRE
JUN 3.310 15.3 CCDV ZRE JUN 15.301 14.1 CCDV ZRE
JUN 6.772 14.8 CCDV ZRE JUN 15.325 14.4 CCDV ZRE
JUN 8.3500 <13.6 HSG JUN 17.05 12.1 GUN
JUN 14.3201 <13.8 HSG
IP Peg is known to have deep eclipses of two magnitudes or more with a
period of 3.8 hours and a duration of several tens of minutes (see AAVSO
Alert Notice 179). Observers are encouraged to monitor these eclipses
throughout the outburst. Please report any positive observations to the
minute (four decimal places).
An AAVSO 'e' scale preliminary chart for IP Peg is posted on the AAVSO
ftp site: http://ftp.aavso.org in /pub/charts/
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FO AQUILAE
The dwarf nova type (SS Cyg subclass) cataclysmic variable FO Aql appears
to be in outburst as indicated by the following observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
JUN 14.9840 14.7 BMM JUN 16.3056 14.3: HSG
JUN 15.2785 <13.8 HSG JUN 17.0160 14.4 BMM
JUN 15.9965 14.3 BMM
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AT ARAE
The dwarf nova type (SS Cyg subclass) cataclysmic variable AT Ara appears
to be in outburst as indicated by the following observations:
AAVSO Observer
UT Mag. Initials
JUN 13.85 <12.4: MLF
JUN 15.841 12.4: MLF
JUN 15.906 12.3: MLF
The uncertainty of the observations is due to the fact that no sequence
exists for this star.
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CH CYGNI
The Z And type cataclysmic variable CH Cyg continues to be very faint (see
News Flash No. 28) as indicated by the following observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
JUN 6.1542 9.9 BRJ JUN 10.3069 9.9 BTH
JUN 6.1708 9.7 SCE JUN 10.9 9.9 FRF
JUN 6.9 9.7 FRF JUN 14.87 9.9 FRF
JUN 7.184 9.77CCDV ZRE JUN 14.933 9.8: SKP
JUN 7.889 8.8 DPA JUN 15.196 9.93CCDV ZRE
JUN 7.9 9.8 FRF JUN 15.3146 9.9 BTH
JUN 8.124 9.69CCDV ZRE JUN 15.9 10.0 FRF
JUN 8.3056 9.8: HSG JUN 16.2500 10.2: DIL
JUN 8.9 9.9 FRF
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RS TELESCOPII
The R CrB type variable star RS Tel is fading as indicated by the following
observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
MAY 14.9 10.6 MLF JUN 11.1 10.9 OB
JUN 5.8 10.8 MLF JUN 12.8 11.2 MLF
JUN 7.8 10.9 MLF JUN 15.8 11.3 MLF
JUN 8.85 11.1 MLF
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AB DRACONIS
The dwarf nova type (Z Cam subclass) cataclysmic variable AB Dra is in
outburst as indicated by the following observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
JUN 12.9493 14.7 BMM JUN 15.2917 12.6 GRI
JUN 13.2813 14.0 BTH JUN 15.9570 12.7 BMM
JUN 13.9875 13.1 BMM JUN 16.2667 12.8 BTH
JUN 14.2577 12.7 BTH JUN 16.3083 12.7 HSG
JUN 14.3028 12.6 HSG JUN 16.9611 12.9 BMM
JUN 14.9111 12.4 BMM JUN 17.2215 12.9 HSG
JUN 15.1264 12.6 BRJ JUN 17.2590 12.8 BTH
JUN 15.2792 12.5 BTH
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We thank the following contributors for the data that they have provided
for this News Flash:
BMM - M. Biesmans, Belgium GUN - J. Gunther, France
BRJ - J. Bortle, USA HSG - G. Hanson, USA
BTH - T. Burrows, USA MLF - B. Monard, South Africa
DIL - W. Dillon, USA OB - D. Overbeek, South Africa
DPA - A. Diepvens, Belgium SCE - C. Scovil, USA
FRF - R. Fidrich, Hungary SKP - P. Skalak, Czech Republic
GRI - J. Griese, USA ZRE - R. Zissell, USA
Please monitor these stars closely and phone-in, fax, or e-mail your
observations to the AAVSO.
Good observing!
Rebecca Pellock, Technical Assistant
in the absence of
Janet A. Mattei, Director
________________________________________________________________________________
Symbols may include: < = fainter than magnitude given (variable not seen)
: = uncertain
CCDV = Charge-coupled device with (V) filter
If you would like to contribute to AAVSO NEWS FLASH, please send
observations of unusual variable star activity to:
observations@aavso.org
Those who wish to subscribe (free of charge) or unsubscribe to NEWS FLASH
may do so by sending a message to:
observations@aavso.org
If you would like data from the AAVSO International Database for
research purposes, please send your request to:
Janet Mattei, AAVSO Director, at aavso@aavso.org
We look forward to including your observations in future editions
of AAVSO NEWS FLASH!
________________________________________________________________________________
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